Wiring Plan - SICK LFV 230 Manuel De Mise En Service

4.2 Wiring plan

Contactless electronic switch
The instrument is used for direct control of relays,
contactors, magnet valves, warning lights, horns etc.
It must not be operated without intermediately
connected load, because the electronic would be
destroyed if connected directly to mains. It is not
suitable for connection to low voltage PLC inputs.
Domestic current is temporarily lowered below 1 mA
after switching off the load so that contactors,
whose holding current is lower than the constant
domestic current of the electronics (3 mA), are
reliably switched off.
Examples for typical applications:
Load resistance at 24 V DC: 88 ... 1800 Ω
l
Rated power, relay 253 V AC: > 2.5 VA
l
Rated power, relay 24 V AC: > 0.5 VA
l
For the plug version valve plug ISO 4400, standard
cable with round wire cross-section can be used.
Cable diameter 4.5 ... 7 mm, protection IP 65.
1 2
3
3
R
L
L1+ N-
PE
1
Fig. 18: Wiring plan, contactless electronic switch with valve plug
ISO 4400
1
Max. level detection
2
Min. level detection
3
Fuse for cable protection
P
Protective ground
E
R
Load resistance (contactor, relay, etc.)
L
Transistor output
For connection to binary inputs of a PLC.
For the plug version valve plug ISO 4400, standard
cable with round wire cross-section can be used.
Cable diameter 4.5 ... 7 mm, protection IP 65.
The M12 x 1 plug connection requires a ready-made
cable with plug.
LFV 230
1 2
3
3
R
L
L1+ N-
PE
2
Subject to change without notice
1 2
3
R
L
L- L+
PA
1
Fig. 19: Wiring plan, Transistor output with valve plug ISO 4400
1
Max. level detection
2
Min. level detection
P
Potential equalisation
A
R
Load resistance (contactor, relay, etc.)
L
Max.
2 1
3 4
R
L
- +
Fig. 20: Wiring plan (housing), transistor output with M12 x 1 plug
connection
1
Brown
2
White
3
Blue
4
Black
R
Load resistance (contactor, relay, etc.)
L
Connecting to power supply
1 2
3
R
L
L- L+
PA
2
Min.
2 1
3 4
R
L
- +
17